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  4. [SOLVED] Invalid use of incomplete type 'class UI::MainWindow'
Forum Update on Tuesday, May 27th 2025

[SOLVED] Invalid use of incomplete type 'class UI::MainWindow'

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incomplete typemainwindowqt5.5header cpp qtinclude
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  • L Offline
    L Offline
    Lorence
    wrote on last edited by
    #12

    ahh, Ui::MainWindow is defined in
    #include "ui_main_window.h"

    didnt think of that, thanks! but new error comes

    http://i.imgur.com/unRPdII.png

    mrjjM 1 Reply Last reply
    0
    • L Lorence

      ahh, Ui::MainWindow is defined in
      #include "ui_main_window.h"

      didnt think of that, thanks! but new error comes

      http://i.imgur.com/unRPdII.png

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #13

      @Lorence

      Yeah, it tries to construct a new Tile to go into the list.

      Can I ask if you want a list of pointers to tiles you have on screen or
      a list with new Tiles that has nothing to do with those on screen?

      1 Reply Last reply
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      • L Offline
        L Offline
        Lorence
        wrote on last edited by Lorence
        #14

        sorry for the late reply.

        i just want a list of tiles to choose from.

        but QT disabled the copying of QLabel,
        so i really need to have a pointer of tiles?

        mrjjM 1 Reply Last reply
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        • L Lorence

          sorry for the late reply.

          i just want a list of tiles to choose from.

          but QT disabled the copying of QLabel,
          so i really need to have a pointer of tiles?

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #15

          @Lorence
          heh 9 mins is not considered late ;)

          then the list must be pointer type or it will be new ones and not the ones on screen.

          so
          std::array<Tile> should be std::array<Tile *> or std::array<Tile &>
          so its the ones on screen and not new ones
          Yes you must at least use & as it must "point" to the real one.

          1 Reply Last reply
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          • L Offline
            L Offline
            Lorence
            wrote on last edited by Lorence
            #16

            then the list must be pointer type
            yea, i edited my last reply

            it will be new ones and not the ones on screen.

            it is the ones on the screen, there will be a list of tiles on the screen and the user will choose what tiles they want to render

            *so
            std::array<Tile> should be std::array<Tile > or std::array<Tile &>
            so its the ones on screen and not new ones
            Yes you must at least use & as it must "point" to the real one.

            thanks!!!!!!!!

            all my problem is fixed :) I have not coded for weeks and C++ is already kicking me damit

            mrjjM 1 Reply Last reply
            0
            • L Lorence

              then the list must be pointer type
              yea, i edited my last reply

              it will be new ones and not the ones on screen.

              it is the ones on the screen, there will be a list of tiles on the screen and the user will choose what tiles they want to render

              *so
              std::array<Tile> should be std::array<Tile > or std::array<Tile &>
              so its the ones on screen and not new ones
              Yes you must at least use & as it must "point" to the real one.

              thanks!!!!!!!!

              all my problem is fixed :) I have not coded for weeks and C++ is already kicking me damit

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by mrjj
              #17

              @mrjj said:
              ok. Super :)

              and tile_list is the ones to choose from ?

              Dont worry. I programmed c++ for 20 years and it still kicks me ;)

              1 Reply Last reply
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              • L Offline
                L Offline
                Lorence
                wrote on last edited by
                #18

                and tile_list is the ones to choose from ?

                yes, it is a list of Tile which is inheriting QLabel

                Dont worry. I programmed c++ for 20 years and it still kicks me ;)

                woaaaaa, me is about a year, and started this QT last week, i choose this for my tile engine's interface from SFML, i still have more ways to go !^_^

                mrjjM 1 Reply Last reply
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                • L Lorence

                  and tile_list is the ones to choose from ?

                  yes, it is a list of Tile which is inheriting QLabel

                  Dont worry. I programmed c++ for 20 years and it still kicks me ;)

                  woaaaaa, me is about a year, and started this QT last week, i choose this for my tile engine's interface from SFML, i still have more ways to go !^_^

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #19

                  @Lorence said:
                  welcome on board to Qt. its a nice frame work.

                  Oh so its some sort of game editor your are making ?

                  1 Reply Last reply
                  0
                  • L Offline
                    L Offline
                    Lorence
                    wrote on last edited by
                    #20

                    welcome on board to Qt. its a nice frame work.

                    Yes my first choice is wxwidget and windows form application, but signals and slots mechanism of qt makes me decide to choose qt

                    Oh so its some sort of game editor your are making ?
                    yes exatcly, like the rpg maker vx ace of steam

                    mrjjM 1 Reply Last reply
                    0
                    • L Lorence

                      welcome on board to Qt. its a nice frame work.

                      Yes my first choice is wxwidget and windows form application, but signals and slots mechanism of qt makes me decide to choose qt

                      Oh so its some sort of game editor your are making ?
                      yes exatcly, like the rpg maker vx ace of steam

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #21

                      @Lorence
                      Well IMHO Qt is more feature rich than wxwidget even I did like that also.

                      Oh. Wow. thats a huge project. !
                      So its an editor and and tile engine for making tile games. Pretty cool.

                      1 Reply Last reply
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                      • L Offline
                        L Offline
                        Lorence
                        wrote on last edited by
                        #22

                        Well IMHO Qt is more feature rich than wxwidget even I did like that also.
                        yea, in other forum's debation, QT always win, whats IMHO?

                        Oh. Wow. thats a huge project. !
                        yes this is a huge project for me XD,
                        and i still got no idea about integrating script language into this project

                        mrjjM 1 Reply Last reply
                        0
                        • L Lorence

                          Well IMHO Qt is more feature rich than wxwidget even I did like that also.
                          yea, in other forum's debation, QT always win, whats IMHO?

                          Oh. Wow. thats a huge project. !
                          yes this is a huge project for me XD,
                          and i still got no idea about integrating script language into this project

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #23

                          @Lorence
                          IMHO = In my humble opinion
                          Well I tested both and choose Qt.

                          Would also be huge for me to make as single person if we are talking full
                          game editor and engine :)

                          I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                          Should be fast enough and quite easy to mix c++ and script.

                          1 Reply Last reply
                          0
                          • L Offline
                            L Offline
                            Lorence
                            wrote on last edited by
                            #24

                            I see

                            Im planning to finish this as in 100%

                            I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                            Should be fast enough and quite easy to mix c++ and script.

                            thanks!

                            We have group on skype do you want to join?

                            mrjjM 1 Reply Last reply
                            0
                            • L Lorence

                              I see

                              Im planning to finish this as in 100%

                              I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                              Should be fast enough and quite easy to mix c++ and script.

                              thanks!

                              We have group on skype do you want to join?

                              mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by mrjj
                              #25

                              @Lorence
                              ok. to make it a full product? To sell or make games and sell ?

                              -- We have group on skype do you want to join?
                              Oh thanks for the offer but I only use skype at work as I sit in the living room and
                              taking in mics drives the others crazy :)
                              So no Team Speak for me either :)

                              So you are a group of people making this?

                              1 Reply Last reply
                              0
                              • L Offline
                                L Offline
                                Lorence
                                wrote on last edited by
                                #26

                                ok. to make it a full project ? To sell or make games and sell ?
                                I want to sell the whole project. i dont want wasting time doing things that is unrelated to programming so i dont want to make games and sell.

                                okay i see np.

                                So you are a group of people making this?
                                No im the only one making this. the skype group is a group of programmers experts and newbies. just for teaching things

                                mrjjM 1 Reply Last reply
                                0
                                • L Lorence

                                  ok. to make it a full project ? To sell or make games and sell ?
                                  I want to sell the whole project. i dont want wasting time doing things that is unrelated to programming so i dont want to make games and sell.

                                  okay i see np.

                                  So you are a group of people making this?
                                  No im the only one making this. the skype group is a group of programmers experts and newbies. just for teaching things

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #27

                                  @Lorence
                                  Ok, a game maker product.
                                  You should also consider how to handle support.
                                  Takes more time than one realizes.

                                  Ah, that way. Did not know skype has such forums/groups.

                                  Really good luck with it.

                                  1 Reply Last reply
                                  0
                                  • L Offline
                                    L Offline
                                    Lorence
                                    wrote on last edited by
                                    #28

                                    yea thanks.

                                    Ah, that way. Did not know skype has such forums/groups.
                                    oh no, im really bad at explaining things. i mean
                                    you can create a conversation group in skype and invite people as many as you can. so i just found this group and then i joined

                                    okay thanks again :)

                                    1 Reply Last reply
                                    0
                                    • S Offline
                                      S Offline
                                      SherifOmran
                                      wrote on last edited by
                                      #29

                                      my friends,i had a similar case and found this happens when you mix different versions of Qt to compile the project
                                      they simply change the ui_*.h files or sometimes they empty it and thus this happens. Occured at least with me ..

                                      1 Reply Last reply
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                                      • mrjjM mrjj

                                        @Lorence said:

                                        grassyTile

                                        What type is that ?

                                        "use of incomplete type" often means a include file is missing
                                        or you forwarded a class
                                        like
                                        class SomeClass;

                                        And try to use it in a context where it needs to be fully defined.
                                        Like adding to some template lists.

                                        Not sure what you tried to define here ?

                                        std::array<Tile,1> tile_list <---- ; missing here?
                                        {
                                        ui->grassyTile // heres where error coming from
                                        };

                                        P Offline
                                        P Offline
                                        Purvi
                                        wrote on last edited by
                                        #30

                                        @mrjj Thanks, you are right for saying that some header files might be missing.

                                        1 Reply Last reply
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